Endurance+: High chlorine resistant, quick dry fabric made from 100% post-consumer waste. Drawstring waist for enhanced fit and security. Integral Support for enhanced comfort. Classic sports styling, straight from the Speedo design archives. This sporty black HyperBoom Jammer nods to our brand heritage with a coral-coloured revival of our iconic go-faster Boom Logo stripe. They’re cut with integral support and an adjustable drawstring for comfort and security during training. Be ready to go again in the quick-drying Endurance+ fabric, designed for durability with high chlorine resistance.